Swarthy Parrotfish, Scarus niger Forsskål 1775
Other Names: Dusky Parrotfish
A terminal male Swarthy Parrotfish, Scarus niger, in Banda Aceh, Indonesia. Source: Ian V. Shaw / Reef Life Survey. License: CC by Attribution
Large males are dark purplish-red anteriorly, greenish posteriorly with dark scale margins, with a reddish upper lip, dark bands around the mouth, and always a dark-edged yellowish 'ear' spot on the body at the upper rear of the gill cover. Females have a reddish head, belly and fins, with wavy dark and white stripes along the side, dark green bands around the mouth and eye.r variable marking on the head, . ,A dark blackish-brown parrotfish with 3-4 darker spots on the rear of each midbody scale, Males are reddish-brown anteriorly, greenish posteriorly with dark scale margin, a reddish upper lip and dark greenish bands around the mouth, and always a yellow to bright green spot with a dark margin on the body at the top end of a line from the mouth through eye to the top of the gill opening. Females have a reddish head, belly and fins with wavy black and white stripes along the side, and dark green bands around mouth and eye.with a red upper lip, dark bands around the mouth Both adult males and females have an orange dorsal fin with a blue margin. Juveniles are dark greenish black, covered in small white spots, with a black spot at the top and bottom of a white band on the tail base.
Cite this page as:
Bray, D.J. 2020, Scarus niger in Fishes of Australia, accessed 29 Nov 2022, https://fishesofaustralia.net.au/home/species/926
Swarthy Parrotfish, Scarus niger Forsskål 1775
Shark Bay and offshore reefs of north Western Australia, to Ashmore Reef in the Timor Sea, and the far northern Great Barrier Reef, Queensland, and reefs in the Coral Sea, to the Solitary Islands, New South Wales; also Cocos (Keeling) Islands and Christmas Island in the eastern Indian Ocean, and the Lord Howe Province in the Tasman Sea. Elsewhere the species is widespread in the Indo-west-central Pacific: Red Sea and East Africa east to Micronesia and the Tuamotu Archipelago, north to Ryukyu and Ogasawara Islands, Japan, southwards Australia, New Caledonia and Tonga.
Inhabits clear areas on coastal and offshore reefs, preferring outer reef slopes and reef crests.
Dorsal fin IX, 10; Anal fin III, 9; Pectoral fin 13-15; Predorsal scales (median) 6-8; Scale rows on cheek 3.
terminal males usually with 2 conical teeth on the upper tooth plate (absent in females); lips mainly covering dental plates; caudal fin rounded in small females, with prolonged upper and lower lobes in large adults.
Adults: body dark blackish brown; scales in midregion of body each with 3-4 darker spots on posterior region, these scales with greenish caste which fades rapidly with removal from water, green spot with darker margin on body adjacent to upper opercular membrane, snout reddish with green band crossing snout above upper lip, chin with 2 green bars; greenish band from corner of mouth to lower margin of orbit, 2 short green postorbital bands, sides of head with darker dots and reticulated markings; sub opercular area often with greenish dots, dental plates blue-green; dorsal and anal fins reddish brown, distal margins blue-green; caudal fin brownish, upper and lower margins blue-green, then sub marginally reddish brown, posterior margin narrowly greenish; upper part of pectoral fins light brown, dorsal-most ray slightly darker, lower rays hyaline dark brown; pelvic fins brownish, spine and anterior rays blue-green. Larger males, body colouration becomes progressively darker purplish green, black spots on body scales and head less prominent (Choat & Randall 1986).
Juveniles: Less than 10 mm, lower half of body dark, upper half translucent, body with series of white pupil-sized dots; 10-40 mm, lower portion of body dark with numerous small pale dots, upper part mottled olive green, white patch on caudal fin base preceded by 2 dark spots; 25-40 mm, caudal peduncle burgundy red; greater than 40 mm, body dark brown black, darkest ventrally, small pale dots on body faded, caudal peduncle pale red brown to brown, white patch at caudal fin base diffused and dark dots faded (Bellwood & Choat, 1989).
|Prorogynous hermaphrodite, changing sex from female to male during the life cycle. Males guard small harems of females and juveniles.|
|Taken in artisanal fisheries in parts of its range.|
|The specific name is from the Latin niger (= black) in reference to the “nigro-fuscus” body colour of this species.|
|Scarus niger Forsskål 1775, Descriptiones Animalium : x, 28. Type locality: Red Sea.|
Bray, D.J. 2020
Swarthy Parrotfish, Scarus niger Forsskål 1775
Allen, G.R. 1993. Fishes of Ashmore Reef and Cartier Island. Records of the Western Australian Museum, Supplement 44: 67-91
Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls.
Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.
Allen, G.R. & Smith-Vaniz, W.F. 1994. Fishes of Cocos (Keeling) Islands. Atoll Research Bulletin 412: 1-21
Allen, G.R. & Steene, R.C. 1988. Fishes of Christmas Island Indian Ocean. Christmas Island : Christmas Island Natural History Association 197 pp.
Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp.
Bellwood, D.R. 1994. A phylogenetic study of the parrotfishes family Scaridae (Pisces: Labroidei), with a revision of genera. Records of the Australian Museum, Supplement 20: 1-86 DOI: 10.3853/j.0812-7387.20.1994.51
Bellwood, D.R. 1985. The functional morphology, systematics and behavioural ecology of parrotfishes (Family Scaridae), Ph.D. thesis, James Cook University, Townsville.
Bellwood, D.R. 2001. Scaridae. pp. 3468-3492 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218.
Bellwood, D.R. & Choat, J.H. 1989. A description of the juvenile phase colour patterns of 24 parrotfish species (Family Scaridae) from the Great Barrier Reef, Australia. Records of the Australian Museum 41: 1-41 DOI: 10.3853/j.0067-1975.41.1989.134
Bellwood, D.R. & Choat, J.H. 1990. A functional analysis of grazing in parrotfishes (family Scaridae): the ecological implications. Environmental Biology of Fishes 28: 189-214.
Choat, J.H., Axe, L.M & Lou, D.C. 1996. Growth and longevity in fishes of the family Scaridae. Marine Ecology Progress Series 145: 33-41.
Choat, J.H. & Bellwood, D.R. 1985. Interactions amongst herbivorous fishes on a coral reef: influence of spatial variation. Marine Biology 89: 221-234.
Choat, J.H., K.D. Clements and W.D. Robbins (2002). The tropic status of herbivorous fishes on coral reefs. 1. Dietary analyses, Marine Biology, 140: 613-623.
Choat, J.H., O.S. Klanten, L. Van Herwerden, D.R. Robertson and K.D. Clements (2012). Patterns and processes in the evolutionary history of parrotfishes (Family Labridae). Biological Journal of the Linnean Society, 107: 529-557.
Choat, J.H., Russell, B., Myers, R., Clements, K.D., Rocha, L.A., Lazuardi, M.E., Muljadi, A., Pardede, S. & Rahardjo, P. 2012. Scarus niger. The IUCN Red List of Threatened Species 2012: e.T190740A17788701. https://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T190740A17788701.en. Downloaded on 12 August 2019.
Choat, J.H., van Herwerden, L., Robbins, W.D., Hobbs, J.P. & Ayling, A.M. 2006. A report on the ecological surveys undertaken at Middleton and Elizabeth Reefs, February 2006. Report by James Cook University to the Department of the Environment and Heritage. 65 pp.
Choat, J.H. & Randall, J.E. 1986. A review of the parrotfishes (Family Scaridae) of the Great Barrier Reef of Australia with description of a new species. Records of the Australian Museum 38: 175-228 DOI: 10.3853/j.0067-1975.38.1986.181
Clements, K.D. & Choat, J.H. 1995. Fermentation in tropical marine herbivorous fishes. Physiological Zoology 68(3): 355-378.
Clements, K.D., German, D.P., Piche, J., Tribollet, A. & Choat, J.H. 2016. Integrating ecological roles and trophic diversification on coral reefs: multiple lines of evidence identify parrotfishes as microphages. Biological Journal of the Linnean Society https://doi.org/10.1111/bij.12914
Colin, P.L.& Bell, L.J. 1991. Aspects of the spawning of labrid and scarid fishes (Pisces: Labroidei) at Enewetak Atoll, Marshall Islands with notes on other families. Environmental Biology of Fishes 31(3): 229-260.
Dudgeon, C.L., Gust, N. & Blair, D. 2000. No apparent genetic basis to demographic differences in scarid fishes across continental shelf of the Great Barrier Reef. Marine Biology 137: 1059-1066
Forsskål, P. 1775. Descriptiones Animalium Avium, Amphibiorum, Piscium, Insectorum, Vermium; quæ in Itinere Orientali observavit Petrus Forskål. Post Mortem Auctoris edidit Carsten Niebuhr. Adjuncta est Materia Medica Kakirina atque Tabula Maris Rubri Geographica. Hauniæ : Mölleri 1-19, i-xxxiv, 164 pp., 1 map. See ref at BHL
Francis, M. 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, southwest Pacific Ocean. Pacific Science 47(2): 136-170 figs 1-2
Francis, M.P. & Randall, J.E. 1993. Further additions to the fish faunas of Lord Howe and Norfolk Islands, southwest Pacific Ocean. Pacific Science 47(2): 118-135 figs 1-22 pls 1-4
Gill, A.C. & Reader, S.E. 1992. Fishes. pp. 90-93, 193-228 in Hutchings, P. (ed.) Reef Biology. A Survey of Elizabeth and Middleton Reefs, South Pacific. Canberra : Australian National Parks Vol. 3, Kowari 230 pp.
Gust, N. 2002. Scarid biomass on the northern Great Barrier Reef: the influence of exposure, depth and substrata. Environmental Biology of Fishes 64: 353-366
Gust, N. 2004. Variation in the population biology of protogynous coral reef fishes over tens of kilometres, Canadian Journal of Fisheries and Aquatic Sciences 61: 205-218.
Gust, N., J.H. Choat, J.H. & Ackerman, J.L. 2002. Demographic plasticity in tropical reef fishes. Marine Biology 140: 1039-1051.
Gust, N., Choat, J.H. & McCormick, M.I. 2001. Spatial variability in reef fish distribution, abundance, size and biomass: a multi-scale analysis. Marine Ecology Progress Series 214: 237-251
Hobbs, J-P.A., Newman, S.J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.R., Choat, H.J. & Ayling, A.M. 2014. Checklist and new records of Christmas Island fishes: the influence of isolation, biogeography and habitat availability on species abundance and community composition. Raffles Bulletin of Zoology Supplement 30: 184–202
Hobbs, J-P.A., Newman, S .J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.R., Choat, H.J. & Ayling, A.M. 2014. Fishes of the Cocos (Keeling) Islands: new records, community composition and biogeographic significance. Raffles Bulletin of Zoology Supplement 30: 203–219
Hoey, A.S. 2010. The ecosystem role of macroalgal browsing fishes on coral reefs. PhD thesis, James Cook University, Townsville.
Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3)
Randall, J.E. 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. Honolulu : University of Hawaii Press 707 pp.
Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 507 pp. figs.
Randall, J.E., Allen, G.R. & Steene, R. 1997. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 557 pp. figs.
Welsh, J.Q., Goatley, C.H.R. & Bellwood, D.R. 2013. The ontogeny of home ranges: evidence from coral reef fishes. Proceedings of the Royal Society B 280: 20132066.
Westneat, M.W. & Alfaro, M.E. 2005. Phylogenetic relationships and evolutionary history of the reef fish family Labridae. Molecular Phylogenetics and Evolution 36: 370–390.